fix(ui): Make incomplete booking form mobile-responsive

[eeshm]

What does this PR do?

Optimized the Incomplete Booking Salesforce integration form for mobile devices.

• Fixes Mobile responsiveness issues in Incomplete Booking Salesforce integration form #26412
• Fixes CAL-7012

Changes

• Hide header row on mobile and show only on md and above
• Convert rows to vertical, card-like layout on mobile
• Add inline labels for mobile accessibility
• Preserve 5-column grid layout on desktop
• Remove inline styles and align with existing responsive patterns

Visual Demo

Image Demo (if applicable):

• Before

• After

Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected).
• I have updated the developer docs in /docs if this PR makes changes that would require a documentation change. N/A
• I confirm automated tests are in place that prove my fix is effective or that my feature works.

How should this be tested?

• Mobile view
• Desktop view

[vercel]

@eeshm is attempting to deploy a commit to the cal Team on Vercel.

A member of the Team first needs to authorize it.

[cubic-dev-ai]

No issues found across 1 file

[dhairyashiil]

LGTM. Thank you for the contribution

[eeshm]

thank you!